A morpholinium ionic liquid for cellulose dissolution

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Dilip G. Raut, Ola Sundman, Weiqing Su, Pasi Virtanen, Yasuhito Sugano, Krisztian Kordas, Jyri-Pekka Mikkola
Publiceringsår: 2015
Tidskrift: Carbohydrate Polymers
Volym: 130
Artikelns första sida, sidnummer: 18
Artikelns sista sida, sidnummer: 25
eISSN: 1879-1344


Abstrakt

A series of substituted morpholinium ionic salts and allyl ammonium acetates were prepared. Amongst those, N-allyl-N-methylmorpholinium acetate ([AMMorp][OAc]) was found to dissolve cellulose readily without any pre-processing of native cellulose. At 120 °C, [AMMorp][OAc] could dissolve 30 wt%, 28 wt% and 25 wt% of cellulose with degree of polymerization (DPn) – 789, 1644 and 2082 respectively, in 20 min. Importantly, SEC analysis indicated that no discernible changes occurred in terms of the degree of polymerization of the different celluloses after regeneration. Furthermore, when comparing the cellulose dissolution capability of these newly synthesized ionic liquids, it is evident that the combination of all three constituents – the morpholinium cation, the existence of an allyl group and choosing the acetate anion are essential for efficient cellulose dissolution. The structure and morphology of the regenerated cellulosic materials were characterized by SEM, XRD, TGA, CP/MAS 13C NMR and FTIR, respectively.

Senast uppdaterad 2019-19-10 vid 02:36